Mounting for gang-saws.



A. JONES.

moumme r011 GANG SAWS.

, APPLICATION FILED HALF], 1908.

Patented May 18, 1909.

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A. JONES.

MOUNTING FOB GANG SAWS.

APPLICATION FILED MAB.17, 190a.

922,283. Patented 18,1909.

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UNTTE SATS PATENT OFFICE.

ARELI JONES, OF OOLITIO, INDIANA.

MOUNTING- FOR GANG-SAWS.

Application filed March 17, 1908.

To all whom it may concern:

Be it known that I, ARELI J ONES, a citizen of the United States, and aresident of Oolitie, in the county of Lawrence and State of Indiana,have invented a new and Improved lrl ounting for Gang-Saws, of which thefollowing is a full, clear, and exact description.

My invention relates to mountings for gang saws, my more particularobject being to produce certain improvements in hanger arms forsupporting the saw and in parts associated with this hanger arm, inorder to improve the general efficiency and safety of the gang saw whilein action.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding arts in all the figures.

Figure 1 is an end e levation of the gang frame upon which is mountedthe adjustable hanger arm, and depending from this are the hanger rodsprovided at their bottoms with bearings carrying the swinging Wrists,the latter in turn supporting the means for holding the saws; Fig. 2 isan enlarged side elevation of the adjustable slide supporting the hangerarm and its accompanying parts; Fig. 3 is a plan view, partly insection, showing mechanism disclosed in Fig. 2 Fig. 4 is a section uponthe line 14 of Fig. 2, looking in the direction of the arrow, andshowing one face of the boxing used in connection with the ends of thehanger arms, this boxingv being adj ustabie relatively to the stationaryframework Fig. 5 is a section through the boxing last mentioned, andshows a spring for neatly fitting the boxing relatively to theframework, and also a screw for adjusting the tension of the spring; andFig. 6 is a view somewhat similar to Fig. 5, but showing the spring inelevation.

Mounted upon posts 7 is a cross beam 8, and supported upon these postsare metal plates 9, each provided with a track 10 integral with it andprojecting slightly therefrom, the plates being held rigidly upon theposts by aid of bolts 11. Bearings 12 are mounted upon the posts 7 andsupported by these bearings is a revoluble shaft 18. Bevel gears 14 aremounted rigidly upon this shaft and mesh with bevel gears 15, the latterbeing rigidly mounted upon the screws 16. The upper ends of the screws16 are encircled by annular bearings 12, the lower ends of the screwsbeing revolubly mounted in bear- Specification of Letters Patent.

Patented May 18, 1909.

Serial No. 421,706.

ings 17. The bearings 12 and 17 are rigid upon the posts 7.

A hanger arm is shown at 18 and is pro vided adjacent to its ends withplates 19 secured rigidly in relation to it by aid of bolts 20. Theplates 19 have generally the form shown in Figs. 2 and 3 and areprovided with necks 21 secured to boxes 22, the latter working upon thethreads of the screws 16 and being adjustable, so as to slide, byrotation of these screws. Each box 22 is provided with a threadedopening 16 through which the screw 16 passes, and is also provided witha face 23 secured to it by aid of bolts 24.

Mounted within each box 22 is a plate 25 provided with slots 26, andextending through these slots are bolts 27. Pressing upon each plate 25is a double ended leafspring 28, and bearing upon this leaf-spring is anadjusting screw 29. By turning this screw the tension of the leaf-spring28, relatively to the plate 25, may be controlled at will, and thepressure of the plate 25 against the track 10 may thus be governed asdesired. As the plate 25 is always pressed toward the track 10, any weareither upon the plate or upon the track is compensated for in suchmanner that no lost motion is likely to develop. Moreover, by adjustingthe screws 29 any tendency to lost motion can still further be avoided.

Journaled upon the necks 21 are hanger rods 30, the upper ends of whichare connected with annular bearings 31 for this purpose. The lower endsof the hanger rods 30 carry bearings 32. J ournaled within thesebearings are necks 33 which are mounted rigidly upon brackets 34. Thesebrackets carry two bars 35, 36 spaced apart, as shown, and used forsupporting the ends of the gang saws. The manner of connecting thesesaws with the members 35, 36, being old and well known, I will notdescribe it.

Generally speaking, the device above del e I o a scribed is employed 1nconnection with gang saws of the type used for cutting ashlers and otherheavy stones. The mechanism, however, may be employed in otherrelations, as desired.

The operation of my device is as follows: The parts being in position,the shaft 13 is turned in any appropriate manner, so as to causerotation of the screws 16. This raises or lowers the boxes 22 and hangerarm 18, together with the various parts depending from the latter andincluding the gang saws. Power being applied in the usual manner, thehanger rods 80, together with parts supported by them, begin to swing,and the saws begin their reciprocating motion.

It will be noted that there are two journals intermediate the hanger arm18 and the bars 35, 36. That is to say, the hanger rods are journaledrelatively to the hanger arm 18, and the bars 35, 36 and brackets 34 arealso journaled relatively to the hanger arm. This double jointing givesthe bars 35, 36 considerable freedom in their swinging move ment andenables them to accommodate themselves to irregularities of motion. Thistends to prevent the breaking or injury of the saws or any of the movingparts, and has also a marked tendency to prevent accidents to oeratives.

aving thus described my invention, I claim as new and desire to secureby Letters Patent:

' 1. The combination of a stationary framework provided with tracks,revoluble screws supported by said framework and disposed parallel withsaid tracks, boxes provided with portions engaging said screws and alsowith portions engaging said tracks, springs mounted within said boxesand engaging said tracks for the purpose of maintaining said boxes inpredetermined positions relatively to said tracks so as to compensatefor wear, and mechanism controllable at will for adjusting the tensionof said spring. 7

2. The combination of a stationary framework provided with tracks,revoluble screws supported by said stationary framework and disposedparallel with said tracks, boxes engaging said screws and adapted to beraised and lowered thereby, springs mounted within said boxes andengaging said tracks for the purpose of maintaining said boxes in a predetermined working relation to said tracks in order to compensate forwear, means for regulating the tension of the springs, a hanger armsupported upon said boxes, and mechanism connected with said hanger armfor supporting saws.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ARELI JONES.

Witnesses:

SYLvANUs JAoxsoN, CHARLES WM. GoBA'r.

